Agilent Technologies N5416A Manual de servicio descargar pdf (Pagina 201)

Low and Full Speed Tests 7

Notes on USB Electrical Compliance Testing 201

Configuring the Tests Make sure you set the Test Type configuration option

to “Low- Speed Near End” before running the test.

Connecting the Equipment The USB automated test application will prompt

you to perform these connection steps:

1 For 54831B/D and 54832B/D oscilloscopes, use 1165A passive probes.

For the 5485XA, 80000 and 90000A Series oscilloscpes, use E2697A

high- impedance converter with 10:1 passive probes, or 1156A active

probes.

2 Attach the passive probes to the oscilloscope's Channel 3 and Channel 2

inputs.

3 Attach the SQiDD board to the root hub on the host under test.

4 Attach a low speed device to the same section of the SQiDD board. If

the section has a switch, it should be set to ON.

5 Connect the oscilloscope Channel 2 probe to D- probe point on the

SQiDD board. Connect the oscilloscope Channel 3 probe to the D+ probe

point on the SQiDD board.

6 Exit the HS Electrical Test Tool if you have previously launched it.

7 Check I have completed these instructions.

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Agilent Technologies N5416A Manual de servicio Pagina 201